The calculated distance (air line) between Sassari and San Gavino Monreale is approximately 82 miles respectively 132 kilometers.
By car or train, the actual journey to San Gavino Monreale is certainly longer, as only the direct route (as the crow flies) between Sassari and San Gavino Monreale has been calculated here.
Air line (approximately)
132 kilometers
71 nautical miles